488 FAMILY- XII. TKICHOPTBRVf!Il)/H. 



segments, three of wbir-h are exposed alwvc ; prosteriiiim produced 

 behind into a long, l)road plate, bifid at apex ; niesosternuni strongly 

 carinate, produced into a broad, spoon-shaped process which covers 

 the hind coxje. 



037 {2U?,~t). LiMULODES PABADOXA Jluttliews, Ann. Lye. Nat. Hist., N. Y., 

 VIII, 1SG7, 409. 

 Clinic, widest in front, very convex. Reddish- yellow, sbining, thickly 

 clothed with a silky .^'r.-iyish pubescence. Thorax very large and convex, 

 widest at base, sides circularly rounded in front, hind angles acute and 

 slightly i>roduced ; surface alutaceous. lOlytra shorter aiid narrower than 

 head and thorax, surface very finely and prettily granulate. Length 1 mm. 



Clark County; scarce. j\Iay 5. Three specimens from ants' 

 nests beneath flat stones. Occurs throughout the United States. 



Ptirijx briunifd Lee, chestnut-brown, thorax vidth sides widest 

 at the base, length .9 mm., and P balteata Lee, bright yellow, tho- 

 rax with sides slightly rounded and widest before the base, length 

 .6 nnn., may occur in southern Indiana. 



Pi'uiellodes Icconlii JIatth., elongate-oblong, yellow, translucent, 

 length 1 nun., may also occur. 



IV Trichoptekvx Kirby. ISlil. (Gr., "feather +wing.") 



A large gvnus of small oblong or ovate species, having the anten- 

 na? 11-jointed, the last three joints forming a bead-like club; head 

 large, rather deflexed ; elytra truncate, usually short ; abdomen with 

 six ventral segments ; hind eoxa^ moderately distinct, the outer edge 

 expanded into a broad plate. Of the 30 or more species known 

 from North America but two have as yet been taken in the State, 

 though several others doubtless occur. 



KEY TO INDIAiS!A SPEelKS OF TRICTIOPTERYX. 



a. Thorax distinctly wider than elylra. 



6. Thorax smooth; elytra not attemiate; color dark chestnut browu, 

 shining; length .!> mm. glabricolus. 



66. Thorax with small, rather remote tubercles or granules. 



c. Head and thorax black, the latter dilated; elytra dark chestnut 



brown; form elongate-oblong. 93S. HAi.iit:MANXi. 



re. Entirely black but thickly clothed with long reddish hair; thorax 



widest berove the base; length .!> mm. ABKrPTA. 



au. Tliorax scarcely or not at all widei- than elytra. 



(/. Hind angles acute, often produccMl. 



e. Head, thorax and abdomen black, elytra dark reddish-brown; 

 length .!) mm. paraixela. 



re. Entirely black or fuscous black. 



/. Elytra widest at apex; length .S mm. aspera. 



